Ho model



' PATENTED JAN. 12 1904.3 M. SALZMANN.

PRESS 'APPLIOATION FILED DEC. 29. 1902.

N0 MODEL.

411'aRMs'Ys WITNESSES n mases.

Patented January 12, 1904.

UNITED STATES PATENT OFFICE.

MAX SALZMANN. MAGDEBURG-BUCKAU, GERMANY PRESS.

SPECIFICATION forming part of Letters Patent No. 749,328, dated January12, 1904.

Application filed December 29, 1902. Serial No. 137,021. (No model.)

To .allvwhom it may concern:

Be it known that I, MAX SALZMANN, 1113113.". ger, a subject of the Kingof Prussia, German Emperor, residing at 82 and 83 Schonebeckerstrasse,Magdeburg Buckau, Prussia, Germany, have invented a new and useful Im-.provement in Presses; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in theart to which it appertains to make and use thesame.

In the presses commonly usedfor the forming of briquets every revolutionmade by the steam-engine corresponds to a stroke of the press, one halfof the revolution moving the piston of the press forward and exertingpres sure, while the other half causes the back stroke of the piston,and therefore does not working it is necessary to give the cylinder of,

1 the steam-engine a larger filling of steam for the forward stroke ofthe piston, by which the forcing-bar attached to an extremely strongcrank-shaft mounted in bearings as near together as possible, on theends of which two fly-wheels with crank-disks are'placed. Thesecrank-disks are connected by pitmen and a cross-piece with thepiston-rod of the steamengine. y

In consequence of the extremely high pressure which it is necessary toemploy in the making of briquets great friction is; produced in thebearings of the press, which are thereby subjected to a considerablestrain, and hitherto it has been practically impossible to work withoutcooling the bearings by water. In spite of the cooling appliances, orrather beoause the supply of water was insufficient, these bearings werevery often found to be heated, causing stoppages of some length. By thenegligence of the workman in charge fractures have also occurred in thehead of the press-bar. This could happen the more easily, as theaccessibility of the parts in question left much to be desired,considerable danger being even incurred in attending them. The number ofrevolutions of the press, and

In the machines commonly thereby its output, being, however, limited bythe speedof the piston and the circumferential velocity of thefly-wheels, it is still further diminished by the above mentionedinconveniences. Presses of this kind usually make from one hundred toone hundred and twenty revolutions per minute. In exceptional cases theymake as much as one hundred and thirty revolutions for a short time; butthis can only be done at the risk of damaging the working parts of themachine or of the general safety.

In the press invented by me all the abovementioned inconveniences areavoided and at thesame time a considerable commercial advantage isobtained, this engine being able to do twice the amount of work with asingle press-head while making a given number of revolutions than washitherto realized and at the same time utilizing more fully the powerfurnished by the steam-engine or the drivingmotor.

i In the accompanying drawings two modifications of my invention areshown.

Figure 1 is a longitudinal vertical section of the press with itsdriving engine placed horizontally. Fig. 2 is a plan of the same press.Fig. ,3 is a longitudinal vertical section of a press having itsdriving-motor in vertical position. Fig. 4 is a plan of the same press.

In the press shown in Figs. 1 and 2 the steam-engine or motor (0 drivesthe crank-shaft 6, on which a fly-wheel is placed, and the crankshaft isconnected by guide-rods c with an oscillating crank d and moves it backand forth. The crank D is of larger radius than the crank on thefiy-wheel shaft, whereby it is oscillated to and fro for each completerotation of the fly-Wheel shaft. I have shown the crank-pin .e at apoint substantially ninety degrees from the crank (i, so that itoscillates up and down between the positions 6, f, and g for eachtoand-fro motion of the crank d. As the pin of the oscillating crank dmoves from 6 to f the piston h of the press executes its forward stroke,by which pressure is exerted, and as the pin passes from f to g thepiston executes its back stroke, by which no work is performed, thedriving-engine a and the crank shaft 6 having made one half revolutionduring these two movements of the piston lb. In the same manner thebackward movement of the oscillating crank from g to f makes the pistonit move forward, thereby exerting pressure, and the oscillating crankcontinuing its movement from f to e the piston performs its back stroke,by which no work is done. The motor a or the crank-shaft I) hascompleted during these two movements of the piston the second half ofits revolution. Therefore it is obvious that a single revolution of thecrank-shaft 12 causes the piston to move backward and forward twice, andtherefore to exert pressure twice.

In the press shown in Figs. 3 and 4 the motor 0 causes the oscillatingcrank (Z to rise and fall by the rising and falling action of itspiston. The forward stroke of the piston of the press exerting thepressure is brought about in the same way as that shown in Figs. 1 and 2during the movement of the oscillating crank from e to f and the backstroke of the piston, by which no work is done, by the movement of theoscillating crank from f to g. In the same way the upward movement ofthe oscillating crank from g to f and from f to 6 causes the piston ofthe press to exert a second pressure and make the backward stroke. Forthe purpose of storing the sur plus energy and of overcoming thedead-point of the rotation the oscillating crank d is connected by apitman c with the crank-shaft b, on which either one or two fly-wheelsare arranged. Thus during one stroke of the piston of the motor a,corresponding to one revolution of the crank-shaft Z2, pressure is twiceexerted by the press. The motor a may be connected in any other way withthe oscillating crank d.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is 1. In a device of the class described, the combinationof a press, a plunger therefor and guides for the plunger, a transverseshaft and operative connections from said shaft to said plunger forimparting to the latter a double reciprocation for each single vibrationof the shaft, and power devices acting on said transverse shaft with amaximum efiiciency at the center of movement of the latter, as and forthe purpose set forth.

2. In a device of the class described, the combination of a press, aplunger therefor and mazes guides for the plunger, a transverse shaftand operative connections from said shaft to said plunger for impartingto the latter a double reciprocation for each single vibration of theshaft, and a plurality of power devices acting on said transverse shaftwith a maximum efiiciency at the center of movement of the latter, asand for the purpose set forth.

3. In a device of the class described, the combination of a die member,a plunger, a pair of transverse shafts one of which is arranged tocontinuously rotate, and having a connecting-rod arranged to vibrate thesecond transverse shaft through a limited arc of movement, and operativeconnections from said second transverse shaft with said plunger forimparting to the latter a double reciprocation for each single rotationof the firstnamed shaft, as and for the purpose set forth.

4.'In a device of the class described, the combination of die members, aplunger, guides for the plunger, a motive-fluid cylinder, a flywheel,and operative connections for rotating the latter, an auxiliarytransverse shaft, a connecting-rod for vibrating the latter, andoperative connections from said shaft for imparting to said plunger adouble reciprocation for each rotation of the fly-wheel, as and for thepurpose set forth.

5. In a device of the class described, a plunger-press and a fly-wheelshaft, an intermediate transverse shaft having cranks, a steam-cylinder,and connecting-rods leading respectively from said cranks to the press,the cylinder, and the fly-wheel shaft, the cranks being disposed toimpart a double reciprocation to the plunger for each singlereciprocation of the otherconnecting-rods, as and for the purpose setforth.

6. In a device of the class described, a plunger-press and atoggle-lever connection for operating the same, motive-power connectionsfor actuating said toggle-joint'levers, and fly-wheel connections actingat a maximum efficiency at the center of movement of the toggle-jointlevers, as and for the purpose set forth.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

MAX SALZMANN.

Witnesses:

SARAH C. MOKELLIP, JAMES L. A. BU'RRELL.

